Re: Need help with loft error

On Wed, 30 Jul 2008 02:39:10 -0700 (PDT), Adam W <adspeedmail@xxxxxxxxx> wrote:

Thanks for the help everyone - TOP, I tried insert>curve>split but get
the same error as before, also tried the fill surface trick which did
actually work but presented problems further down the track when I
wanted to cut through the filled surface. In the end I settled for
your suggestion of putting the circle inside the circle and lofting to
that, which gave me a workable solution although not quite the exact
geometry I wanted. FYI, it is a race engine intake port and manifold
system that I'm playing with so the actual geometry of the finished
part will be fettled by hand anyway...

Clay - Im intrigued by your suggestion also as when I tried playing
with different start profiles, SW was sometimes happy to loft up to
the projected curve? No matter how many segments though, I still
couldn't get it to work with the start profile that I wanted to use.

Appreciate the Help!

You need segments on both ends, equal numbers, and how
you select (and where) each one probably matters. So does
their relative lengths as each segment will "map" to another
(getting each length just right can be interesting <g>).
Your resultant surface(s) (in this case as I grasp it from
your picture) would really be several developable/ruled
surfaces.
Some of the more fancy stuff allowed/required all sorts of
guide curves too but I don't think you need any for this
(even if SW uses/allows such).

Another method you might try would be to "project/translate/scale"
your circle past where you want the left-side surface to end,
generate the more simple surface between that circle location & your
starting curves (on right) and then trimming the result with
your pre-existing surface/solid.


http://www.ptc.com/appserver/wcms/data***/main.jsp?&im_dbkey=65285&icg_dbkey=841
We had an early release of CV's (Bezier) Advanced Surface Design (ASD)
long ago. Fun.
--
Cliff
.